Chrome plated stamped steel headlight bulb retaining ring. 3 tabs for screws used to secure headlight bulb into the bucket.
1940-54 Buick all models and 1955 first type
1940-54 Cadillac all models
1940-55 Oldsmobile all models
1940-55 Pontiac all models with 1st type
1940-55 Chevrolet all models with 1st type, including Corvette
1962-64 Chevrolet series 10-30 except D-D